The Building That's in Two Countries at Once

Another is the Haskell Free Library and Opera House, built on the US/Canada border. (https://en.wikipedia.org/wiki/Haskell_Free_Library_and_Opera... )

There's also the Hotel Arbez on the border between Switzerland and France. (https://en.wikipedia.org/wiki/Hotel_Arbez )

And a bar on the border between Slovenia and Croatia: http://www.thedailybeast.com/articles/2014/01/06/half-of-thi... .